We Carry Bulk Organic Soil Amendments and Blended Organic Soils for Gardening!



MWG Outdoor Garden Soil Menu 2021:

These are professional grade outdoor soil blends for organic growers. The following soil blends are available locally/regionally in the Spokane WA area. These are our most popular gardening soils. All soils below are priced by the yard. Quantities of less than one yard are available. All of the soil blends are also sold by the cubic foot for smaller projects.   

Premium Compost Blend -----------$75.00/Yard 

Our most popular mix for adding organic matter to gardens. This blend consists of: certified organic composted forest products, aged bark super fines, Stutzman's 3-2-2 compost chicken manure and feather meal. Designed to give your garden a real boost and lots of fresh organic matter.     

Premium Organic Garden Blend ---$90.00/Yard

This is a premium grade garden soil for serious gardeners. Our premium garden blend consists of: certified organic composted forest products, aged bark super fines, worm castings, fish bone meal, blood meal, feather meal, alfalfa meal, rock phosphate, langbeinite, kelp and beneficial microbes.  

Premium Greenhouse Blend --------$156.00/Yard

Designed to run in outdoor pots, greenhouses or where good drainage but proper water retention is required.  This blend has peat moss, composted forest products, pumice, fish bone meal, feather meal, langbeinite, basalt rock dust, potassium sulfate, dolomite, kelp, oyster shell, azomite, and beneficial microbes.     

Tree & Shrub Blend ------------------$75.00/Yard

This blend is designed for planting trees and shrubs where low nitrogen and a touch of beneficial fungi is recommended. The ingredients include: composted forest products, aged bark super fines, fish bone meal, soybean meal, langbeinite, feather meal, rock phosphate, humic acid, basalt rock dust, kelp and endo/ecto mycorrizal fungi.          

Nursery Blend -------------------------$126.00/Yard

This long term outdoor potting soil is blended with aged bark in the mix to help maintain soil structure for multiple seasons. It is also made to work with fertigation systems. 


MWG Top Dress Blends 2021:  

Our compost top dress products are not soil. They are highly amended compost based products designed to be used as a top dress fertilizer.The application rate for a top dress is 2"-4" top dressed around the root ball area. The compost top dress products can also be used to re-amend used soils. Our recommended application rate is 25%-30% of the total volume of the soil to fully re-amend used soils with nutrients and fresh compost. 

Fish Compost Top Dress ------------------$200.00/Yard

A top dress for people that want a fish based nutrients mixed into a rich blend of Oly Mountain fish compost, worm castings, bio char and composted forest products for superior vegetative growth while adding new organic matter into your soil. This blend also includes: fish emulsion, crustacean meal, fish meal, kelp, fish bone meal, alfalfa meal, oyster shell, langbeinite, humic acid, bokashi, rock phosphate, basalt rock dust, azomite, dolomite and sulfate of potash.   

Biochar Compost Top Dress --------------$210.00/Yard 

The bio char top dress has twice the bio char of the fish top dress for superior nutrient and microbe retention. This blend offers great vegetative growth, new organic matter for your soil and the added benefits of bio char for increased yields. This blend includes: Peat moss, composted forest products, aged bark super fines, worm castings, bio char, blood meal, crustacean meal, kelp meal, bone meal, feather meal, alfalfa meal, insect frass, neem meal, humic acid, langbeinite, rock phosphate, oyster shell, glacier rock dust, basalt rock dust, azomite, dolomite.     


MWG Indoor Soil Menu 2021:

These soil blends are professional grade soils designed for indoor grow operations. We build all of our indoor soils when you order them, because we inoculate all of our indoor soil blends with active beneficial microbes. We want you to receive fresh soils with high microbe populations of active beneficial microbes Quantities of less than one yard are available. All soil blends are also sold by the cubic foot for smaller projects.    

Organic Seedling Blend -----------$245.00/Yard 

Coconut coir, peat moss and soil grade perlite based seedling tray blend with worm castings and a light dose of nutrients perfect for starting your plants. The nutrients include: soybean meal, fish bone meal, kelp, alfalfa meal, oyster shell, azomite, rock phosphate, basalt rock dust, dolomite, beneficial microbes.   

Peat Soilless Media ----------------$215.00/Yard 

A basic peat based soil less media consisting of: peat moss, coconut coir, perlite, pumice, worm castings, azomite, oyster shell, humic acid, basalt rock dust, dolomite, beneficial microbes.  

Just Coir Soilless Media -----------$284.00/Yard 

This soil less media is a coco coir based soil less media where the highest porosity is required. The blend includes: coco coir, perlite, pumice, azomite, oyster shell, humic acid, basalt rock dust, dolomite.   

Organic Coco Blend -----------------$254.00/Yard 

This is a indoor high porosity high coconut coir based soil blend. This is a great soil for growers transitioning out of a soil less media into a light soil media. This blend has a light load of nutrients allowing the grower to determine their feeding schedule. Organic Coco blend includes: coconut coir, perlite, peat moss, worm castings, bat guano, fish bone meal, kelp meal, neem meal, oyster shell, humic acid, basalt rock dust, rock phosphate, azomite, sulfate of potash, dolomite, diatomaceous earth and beneficial microbes.   

Ocean Blend -------------------------$245.00/Yard

An indoor peat based soil blend with the best amendments that the ocean has to offer. This is a full strength soil that will give you vigorous growth throughout your plants life cycle. this blend includes: peat moss, coco coir, perlite, Oly Mountain fish compost, composted forest products, worm castings, crustacean meal, fish bone meal, fish meal, kelp meal, oyster shell, neem meal, humic acid, rock phosphate, basalt rock dust, azomite, dolomite, lime, sulfate of potash, bokashi and beneficial microbes. 

Sub-Cool Super Soil ----------------$295.00/Yard 

i502-white-background.jpgSpecifically made for the 502 Industry, it's made with the best organic ingredients along with our farm fresh worm cast and then cooked (steeped) for a minimum of 30-days.  The recipe we use is available upon request when you call or come by our store; you'll know exactly what our soil blend contains making it easy for you to tailor your nutrient routines to your specific grow operation.  WARNING:  This is a very hot organic blend that will burn plants and should only be used by professional growers.

We assure quality of each custom soil mix by performing a quality test to check the dry and wet pH, density and leach fluid ppm for our mix records.


Bulk Soil amendments for 2021

Worm Castings, Composted forest products, Pumice, Aged bark super fines, Bio char. 


Delivery Available: Need help getting your gardening materials delivered contact us for a quote. We deliver locally within the Spokane WA. region. We have a dump truck and can haul up to 12 yards per delivery. For larger orders we have the ability to ship commercially. Please call 509-928-3995 for further information.   



Marlé Worm Growers mixes custom soil blends for organic growers all over the northwest. We can typically blend soil cheaper than you can buy all of the ingredients and mix it your self, saving you time and money! Contact us either come by our store or call 509-928-3995 and request a bid for your custom blend. Commercial Growers, please contact us for pricing and availability. Confidentiality Agreements are available where applicable.